Seasoned 4-bolt mainMax .040 boreOne piece rear main sealSonic tested to assure wall thicknessAlign honed main bearing bore
New cast steel premium crankHypereutectic pistonsNew roller camshaft
Cast Iron Vortec1.25 dia. valve springs, hardened retainers and keepers2.02 swirl polished intake valves1.60 swirl polished exhaust valvesElgin hardened push rodsLong slot rockers with positive lock adjusting nuts
Cam Type: Roller.503 Intake .510 Exhaust224 Intake / 230 Exhaust duration @ .050 - 112 degree lobe separation
New cast iron marine intakePolished aluminum valve coversOil panBrass freeze plugsDyno test results shipped with engine
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